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Microshear bond strength of dual-cure resin cement in zirconia after different cleaning techniques: an in vitro study
Katherine Joselyn Atoche-Socola1, Luis Ernesto Arriola-Guillén2, Ana Isabel López-Flores1
1Division of Oral Rehabilitation, School of Dentistry, Universidad Científica Del Sur, Lima, Perú.
Purpose:
This study aimed to compare the microshear bond strength (µSBS) of dual-cure resin cement in CAD-CAM zirconia after different cleaning techniques.
Materials And Methods:
Fifty discs of zirconia-based ceramic from Ivoclar Vivadent were embedded in acrylic resin. The discs were divided into five groups according to the cleaning methods used: Group 1: drying with spraying + sandblasting with Al2O3; Group 2: washed with water and dried with spraying + sandblasting with Al2O3; Group 3: washed with distilled water and dried with spraying + sandblasting with Al2O3 + zirconium oxide (Ivoclean); Group 4: washed with distilled water and dried with spraying + sandblasting with Al2O3 + potassium hydroxide (Zirclean); and Group 5: washed with distilled water and dried with spraying + sandblasting with Al2O3 + 1% NaClO. All of the groups were contaminated with artificial saliva for 1 minute and then cleaned. Statistical analyses were performed using ANOVA and Tukey's tests.
Results:
There were statistically significant differences among all groups for µSBS (P < .05). The group treated with zirconium oxide (Group 3) showed the highest µSBS (18.75 ± 0.23 MPa).
Conclusion:
When applied to zirconia, the cleaning methods affected the bonding with resin cement differently.
